CVE-2026-67858

HIGH 7.5

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

Buffer Overflow vulnerability exists in open62541 1.5.5 when the Local Discovery Server (LDS) is built with multicast discovery enabled through the MDNSD backend. An unauthenticated remote attacker can send a RegisterServer or RegisterServer2 request containing many unique discoveryUrls. This allows remote attackers to cause a denial of service.

Vendor	n/a
Product	n/a
Published	Aug 4, 2026
Last Updated	Aug 4, 2026

Stay Ahead of the Next One

Get instant alerts for n/a n/a

Be the first to know when new high vulnerabilities affecting n/a n/a are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

CVSS:3.1/AC:L/AV:N/A:H/C:N/I:N/PR:N/S:U/UI:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

n/a / n/a

n/a

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/open62541/open62541/issues/8094 github.com: https://github.com/open62541/open62541/tree/master/examples/discovery github.com: https://github.com/open62541/open62541/blob/master/src/server/ua_services_discovery.c github.com: https://github.com/open62541/open62541/blob/master/src/server/ua_discovery_mdns.c github.com: https://github.com/open62541/open62541/blob/master/doc/building.rst